OnPageBackgroundTaskCompleted (Page) Trigger
Version: Available or changed with runtime version 4.0.
Runs after a page background task has successfully completed.
Syntax
trigger OnPageBackgroundTaskCompleted(TaskId: Integer; Results: Dictionary of [Text,Text])
begin
...
end;
Parameters
TaskId
Type: Integer
Specifies the ID of the background task that was run. The ID is automatically assigned to the background task when it is created.
Results
Type: Dictionary of [Text,Text]
Specifies the results of the page background task.
Remarks
The callback triggers can't execute UI operations, except notifications and control updates. This means that, for example, CurrPage.Update() statements are ignored because they would in many cases lead to infinite loops when page background tasks are started from the OnAfterGetCurrRecord trigger.
Example
The following example modifies the OnPageBackgroundTaskCompleted trigger to update the page with the started and finished times that were calculated in the page background task, and displays a notification that the times have been updated. For more details about this example, see Page Background Tasks.
trigger OnPageBackgroundTaskCompleted(TaskId: Integer; Results: Dictionary of [Text, Text])
var
started: Text;
waited: Text;
finished: Text;
PBTNotification: Notification;
begin
if (TaskId = WaitTaskId) then begin
Evaluate(started, Results.Get('started'));
Evaluate(waited, Results.Get('waited'));
Evaluate(finished, Results.Get('finished'));
before1 := started;
duration1 := waited;
after1 := finished;
PBTNotification.Message('Start and finish times have been updated.');
PBTNotification.Send();
end;
end;
See Also
Get Started with AL
Developing Extensions
OnPageBackgroundTaskCompleted (Page Extension) Trigger
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